CN102368434A - Open-type electronic current transformer - Google Patents
Open-type electronic current transformer Download PDFInfo
- Publication number
- CN102368434A CN102368434A CN2011100543381A CN201110054338A CN102368434A CN 102368434 A CN102368434 A CN 102368434A CN 2011100543381 A CN2011100543381 A CN 2011100543381A CN 201110054338 A CN201110054338 A CN 201110054338A CN 102368434 A CN102368434 A CN 102368434A
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- China
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- current transformer
- secondary winding
- open
- printed panel
- type electronic
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Abstract
The invention relates to an open-type electronic current transformer, which is formed by connecting a secondary winding with a secondary converting unit, wherein the secondary winding is formed by carrying out butt joint on two C-shaped printing plates, and more than three small pasters are evenly and vertically fixed on each C-shaped printing plate at intervals; the two C-shaped printing plates are respectively provided with a loop which is formed by sequentially connecting more than three small pasters in series, and the two loops on the two C-shaped printing plates are connected by an STP (shielded twisted pair); and an outlet end of the secondary winding is connected with the secondary converting unit by an STP to realize measurement output and signal protection. One end of the current transformer is movably connected, and the other end of the current transformer can be opened; the integral processing of the current transformer is convenient, the accuracy is high, the frequency band range is wider, the magnetic saturation is avoided, the secondary open-circuit high-voltage danger does not occur, and an air-core coil current transformer is switched on/off to be used; and the open-type electronic current transformer is safe and convenient, is suitable for current measurement and relay protection of power systems with voltage being 35kV or below 35kV, and is wide in scope of application.
Description
Technical field
The present invention relates to a kind of current transformer, but be the electronic current mutual inductor that a kind of folding is measured specifically, be applicable to the current measurement and the relaying protection of 35kV and following electric pressure electric power system.
Technical background
Current transformer is widely used in the measurement and the protection of electric power system, is one of visual plant in the electric power system, and its reliability and accuracy are to safe, the stable and economical operation important influence of electric power system.Development along with electric power digitalization, miniaturization and automation; But the electromagnetic current transducer CT of traditional folding adopts on the silicon steel sheet coiling through the epoxy resin cutting of being honored as a queen admittedly; Be assembled into complete current transformer again; This kind structure exposes that volume is big, magnetic saturation, magnetic resonance, defectives such as dynamic range is little and frequency band is narrow, low precision, is difficult to satisfy the demand of power system development of new generation.In addition, existing most of air core coil is employed in the method for coiling lead on the non magnetic skeleton, and the coil sampling precision depends on loop density and constant skeleton sectional area, and manufacturing process requirement is high, and the dispersiveness during batch process is big, is not easy to industrialized development.
Summary of the invention
The objective of the invention is in order to have overcome existing current transformer magnetic saturation, magnetic resonance and the low defective of certainty of measurement; Provide a kind of simple in structure; Easy to process, the frequency band range of broad, no magnetic saturation are arranged; Certainty of measurement is high, the no second open circuit open type electronic current mutual inductor that Keep Clear-High Voltage.
In order to achieve the above object; The technical scheme that the present invention adopts is: a kind of open type electronic current mutual inductor; Connecting the secondary converting unit by secondary winding forms; Its technical characterstic is that said secondary winding is formed by two " C " type printed panel butt joints, and even vertical fixing at interval has little paster more than three on every " C " type printed panel, is respectively equipped with the loop that is in series successively by little paster more than three on two " C " type printed panels; Two loops on two " C " type printed panel connect through Shielded Twisted Pair, and the leading-out terminal of secondary winding connects the secondary converting unit through Shielded Twisted Pair and realizes output measurement and guard signal.
Further, the leading-out terminal of said air core coil is arranged between two little pasters on arbitrary " C " type printed panel.
Again further, said little paster is the rectangle hollow coil, and the end of incoming cables of a rectangle hollow coil of adjacent two rectangle hollow coils is connected in series with the leading-out terminal of another rectangle hollow coil.
The beneficial effect that the present invention reaches is: the effect of little paster is to obtain tested current field to change the induced potential that is produced; The effect of printed panel is to provide the loop to be together in series to little paster; Adopt two " C " type printed panel coil wire laying modes flexible, the loop of arranging on " C " type printed panel can provide secondary winding air core coil link circuit, and is simple in structure; Easy to process; Cost of manufacture is low, can select to have " C " type printed panel of the little paster of different numbers according to tested size of current, and is applied widely; Adopt the little paster of rectangle hollow coil to be combined into the special construction of air core coil, do not have magnetic material, when two " C " types of instrument transformer printed panel separates; Certainty of measurement is had no influence, reach high accuracy, good stability easily; The frequency band range that broad is arranged the magnetic saturation phenomenon can not occur.
The present invention's little paster of a plurality of rectangle hollow coils of on two " C " type printed panels, connecting; But connect into the secondary winding hollow coil current transformer of an end flexible connection, other end opening again through Shielded Twisted Pair; Whole easy to process, precision is high, the frequency band range of broad is arranged, no magnetic saturation, Keep Clear-High Voltage for no second open circuit; The hollow coil current transformer opening and closing can be used; Safe and convenient is applicable to the current measurement and the relaying protection of 35kV and following electric pressure electric power system, and is applied widely.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: C type printed panel 1, little paster 2, Shielded Twisted Pair 3,31, secondary converting unit 4.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Shown in Figure 1; Open type electronic current mutual inductor of the present invention; Formed by 1 butt joint of two C type printed panels, be furnished with the loop that little paster series connection is provided on the printed panel, the loop of two C type printed panels forms complete loop through Shielded Twisted Pair 3; And then vertical fixing the little paster 2 of some above the printed panel, and little paster is according to counterclockwise evenly being weldingly fixed on printed panel successively; Little paster is through the loop on the printed panel (representing like solid line on the accompanying drawing 1) series connection each other successively; Be provided with in addition on two C type printed panels two halves C type printed panel is connected into loop (representing like dotted line on the accompanying drawing 1) together; The two halves loop links into an integrated entity through Shielded Twisted Pair; The quantity of two little pasters is selected according to tested size of current, is useful on the main printed panel to a plurality of little pasters accurate location and reliable mechanical fixture are provided; The air core coil that completes is installed in the shell; Use epoxy resin to seal admittedly; Cut open from the centre after the full solidification; Re-use the metal waistband two halves instrument transformer is combined into a complete electronic mutual inductor; The secondary winding air core coil of electronic mutual inductor is end flexible connection, other end hatch frame, and directly snapping in cable by opening part during use can measure, and the leading-out terminal of secondary winding air core coil is measured and guard signal through two passages outputs of secondary converting unit 4 through Shielded Twisted Pair 31.
Claims (3)
1. open type electronic current mutual inductor; Connecting the secondary converting unit by secondary winding forms; It is characterized in that: said secondary winding is formed by two " C " type printed panel butt joints; Even vertical fixing at interval has little paster more than three on every " C " type printed panel; Be respectively equipped with the loop that is in series successively by little paster more than three on two " C " type printed panel, two loops on two " C " type printed panel connect through Shielded Twisted Pair, and the leading-out terminal of secondary winding connects the secondary converting unit through Shielded Twisted Pair and realizes output measurement and guard signal.
2. open type electronic current mutual inductor according to claim 1 is characterized in that: the leading-out terminal of said secondary winding is arranged between two little pasters on arbitrary " C " type printed panel.
3. open type electronic current mutual inductor according to claim 1 is characterized in that: said little paster is the rectangle hollow coil, and the end of incoming cables of a rectangle hollow coil of adjacent two rectangle hollow coils is connected in series with the leading-out terminal of another rectangle hollow coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100543381A CN102368434A (en) | 2011-03-08 | 2011-03-08 | Open-type electronic current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100543381A CN102368434A (en) | 2011-03-08 | 2011-03-08 | Open-type electronic current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102368434A true CN102368434A (en) | 2012-03-07 |
Family
ID=45760993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100543381A Pending CN102368434A (en) | 2011-03-08 | 2011-03-08 | Open-type electronic current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102368434A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426620A (en) * | 2013-08-30 | 2013-12-04 | 南京南瑞继保工程技术有限公司 | Open-close type electronic current transformer |
| CN104377011A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Half-open type electronic current transformer |
| CN104835639A (en) * | 2015-05-12 | 2015-08-12 | 林纪秋 | Cable cross-core all-shield electronic current transducer |
| CN105425075A (en) * | 2015-12-08 | 2016-03-23 | 国家电网公司 | Relay protection alarm device |
| CN108226603A (en) * | 2016-12-13 | 2018-06-29 | 保时捷股份公司 | For measuring the device and method of the electric current in electric conductor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554952A (en) * | 2003-12-22 | 2004-12-15 | 华中科技大学 | Hollow coil and its preparing method |
| CN2836201Y (en) * | 2005-08-01 | 2006-11-08 | 西华大学 | Split PCB hollow coil current transformer |
| CN201478104U (en) * | 2009-09-15 | 2010-05-19 | 安徽翔远电力科技有限公司 | Electronic current transformer based on self-adhesive hollow coil |
| CN202034228U (en) * | 2011-03-08 | 2011-11-09 | 江苏科兴电器有限公司 | Open-type electronic-type current transformer |
-
2011
- 2011-03-08 CN CN2011100543381A patent/CN102368434A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554952A (en) * | 2003-12-22 | 2004-12-15 | 华中科技大学 | Hollow coil and its preparing method |
| CN2836201Y (en) * | 2005-08-01 | 2006-11-08 | 西华大学 | Split PCB hollow coil current transformer |
| CN201478104U (en) * | 2009-09-15 | 2010-05-19 | 安徽翔远电力科技有限公司 | Electronic current transformer based on self-adhesive hollow coil |
| CN202034228U (en) * | 2011-03-08 | 2011-11-09 | 江苏科兴电器有限公司 | Open-type electronic-type current transformer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426620A (en) * | 2013-08-30 | 2013-12-04 | 南京南瑞继保工程技术有限公司 | Open-close type electronic current transformer |
| CN103426620B (en) * | 2013-08-30 | 2015-11-18 | 南京南瑞继保工程技术有限公司 | Open-close type electronic current transformer |
| CN104377011A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Half-open type electronic current transformer |
| CN104835639A (en) * | 2015-05-12 | 2015-08-12 | 林纪秋 | Cable cross-core all-shield electronic current transducer |
| CN105425075A (en) * | 2015-12-08 | 2016-03-23 | 国家电网公司 | Relay protection alarm device |
| CN105425075B (en) * | 2015-12-08 | 2018-08-24 | 国家电网公司 | Relay protection warning device |
| CN108226603A (en) * | 2016-12-13 | 2018-06-29 | 保时捷股份公司 | For measuring the device and method of the electric current in electric conductor |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120307 |